Bug
- [SPARK-33] - Saving a dataframe causes schema inference.
- [SPARK-36] - MongoClient closed
- [SPARK-38] - Dataframe NPE issue handling null data
- [SPARK-40] - Schema inference on structs in an array doesn't merge schemas
- [SPARK-41] - Don't assume ObjectId's when sampling data
New Feature
Improvement
- [SPARK-32] - Validate the ConnectionString when its used to create Read and Write Configurations
- [SPARK-37] - Handle conversion to Numeric types after caching
- [SPARK-42] - Allow Dataframe readers and writers be configurable just from options
- [SPARK-43] - Ensure that Bson Types are preserved when round tripping dataframes.
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